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2,276 Articles
8,714 Members
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The world's best gem articles, published weekly.

Most Recent Articles

recutting diamonds - VS1 diamond
Recutting Diamonds and Colored Gemstones

When is recutting diamonds and other gems worthwhile for a professional gemologist? Learn how to make this determination and avoid potential problems.

faceted proustite - 2.58 cts
Proustite Value, Price, and Jewelry Information

Proustite crystals have magnificent red colors and good brilliance. Although facetable, they’re too soft for jewelry use but highly desired as collector’s gems.

diamond and garnet platinum engagement ring - grading set gemstones
How to Grade Set Gemstones

Gems in jewelry settings can’t be evaluated the same way as loose stones. These guidelines are for gemologists learning to grade set gemstones.

searching for diamonds online - ring set
Searching for Diamonds Online — Save With These Tips!

Searching for diamonds online shouldn’t be so complex. Use our recommended parameters to buy the best diamond for your engagement ring — and your wallet!

ring with bezel and channel settings - protective gem settings
Protective Gem Settings for Rings

All gemstones, from fragile opals to durable diamonds, can benefit from protective gem settings. Learn which jewelry designs are best suited for ring use.

fluorite with color zoning and phantoms - gem formation
Gem Formation: How are Gemstones Created?

Gem formation usually involves mineral crystallization and other geological processes. Learn how these affect the gemstone properties gemologists study.

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"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."
Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member

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Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

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